Fix regression that causes to have an empty pub-gruu on module::Registrar output
Fix regression that causes to have an empty pub-gruu on module::Registrar output

(cherry picked from commit 3b6aaa71a6d3c94b0447e3bc0bc1281fcd77a615)
(cherry picked from commit 3f9a07fa3e4be676e3c1112fcb3a891007c660d4)

BelledonneCommunications/flexisip,BelledonneCommunications/flexisip,BelledonneCommunications/flexisip,BelledonneCommunications/flexisip